U0168
Lost Communication With Vehicle Security Control Module
U0168 is an OBD-II diagnostic trouble code meaning: Lost Communication With Vehicle Security Control Module. Common causes: broken or damaged wires in the communication circuit, corrosion of contacts in connectors. Estimated repair cost: $56–167.
Symptoms
- The immobilizer system does not work
- The alarm does not turn on
- Check Engine Light Is On
- There may be problems starting the engine
- Loss of communication with other modules
Causes
- Broken or damaged wires in the communication circuit
- Corrosion of contacts in connectors
- Security module malfunction
- Module power problems
- Software errors
How to Fix
- Check the integrity of wiring and contacts
- Scan all modules for errors
- Check power supply and grounding of the safety module
- Reflash or replace the security module if necessary
- Repair only from an authorized dealer
Related codes
Error U0168 by Vehicle Brand
FAQ
What does the U0168 code mean?
U0168 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Vehicle Security Control Module
What causes a U0168 error code?
The most common causes of U0168 include: Broken or damaged wires in the communication circuit; Corrosion of contacts in connectors; Security module malfunction; Module power problems.
How do I fix a U0168 diagnostic trouble code?
To fix U0168: Check the integrity of wiring and contacts. Scan all modules for errors. Check power supply and grounding of the safety module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0168?
Do not drive — repair immediately
How much does it cost to fix U0168?
The estimated repair cost for U0168 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat